Grate-bar



(No Model.)

O. REILLY.

GRATB BAR.

No.v 434,722. Patented Aug. 19, 1890.

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4UNITED A' STATES PATENT OFFICE.

OWEN REILLY, OF NEW YORK, ASSIGNOR TO GEORGE H. CLARKE, OF

. BROOKLYN, NEWv YORK.

AeaATE-BART SPECIFICATION forming pm of Letters Patent No. 434,722, dared August 19,1890. Application ned mmh 1.1888. 1senti No. 265,843. (No model.)

To a/ZZ whom it may concern:

` Be it known that I, OWEN REILLY, a citizen of the United States, residing at New York, county and State of New York, have' surfaces of the longitudinal bars.

Now this invention relates to shaking grates, and embraces means for preventing the lateral displacement of the longitudinal bars, consisting of upwardly projecting guideilanges at the ends of the bearing-surfaces of the transverse crank-bearing bars, and corresponding recesses formed in the sides of the longitudinal bars, in which the guide-flanges fit and hold the longitudinal bars apart. These guide-flanges are most useful on the upper bearing surfaces of the transverse crank-bearing bars; but may in some cases be formed on the lower bearing-surfaces also.' By this construction the grate-bars can be cast on their sides without necessitating eXtra molding or the use of cores to form the recesses for the guide-flanges ofthe crank-bearing bars, whereas to apply my above-men.- tioned invention to grate-bars, which require to be `molded on their sides, cores are necessary to produce the recesses in the central parts of the bearing-surfaces.

This invention also embraces improvements in the construction of the grate-bars particularly adapted for use with transverse crankbearing bars, and which will be fully described in the following description of the accompanying drawings, in which-` p Figure 1 is an elevation, partly in section, of a grate embodying my improvements. Fig. 2 is a section of the same on the line wat, Fig. 1. Fig. 3 is a vsection of the same on the line fy y, Fig. 1. Fig. e is a plan view showing two complete bars; and Fig. 5 is a transverse section of the same on the line z e' of Figs. 2, 3,

and 4..

The crank-bearing bars c a are supported by their rocker ends a ct in the two outside longitudinal bars b b of the grate, and the inside longitudinal bars c c and d d are supportedv by the upper bearingsY e e and the lowerbearings ff, respectively, of the bars 0L a, as in shaking grates of the class to which this invention relates. The grate-bars, as in my before-mentioned application, are devoid of any side lugs or spacing-pieces, but are controlled as regards lateral movements bya peculiar formation of their bearing-surfaces andthe crank-bearing bars. In this case each of the upper bearings ve e of the bars a a are provided at their ends with guide-flanges e e', between which the central portion of the bearing-surfaces of the bars c c fits, as clearly shown at Fig. 1, the sides of the bars c c having recesses c c formed therein for the reception of the guide-flanges e e', as shown at Fig. 2.

To utilize the full length of the bearing- Vsurfaces between the crank-bearing bars a a and the grate-bars c c, the tops of the guideiianges e c are made to iit against the upper walls of the recesses c c. These walls are made concentric with the bearings e e, which iit sufficiently close in the ends of the bars c c to move and control them when one or both of the .crank-bearing bars a a is or are rocked, and the recesses c c are somewhat wider than the anges e e to allow for this rocking action. The flanges c e may be made to lit snuglyA in the recesses c c', the necessary freedom being provided between the bearingsurfaces of the bars c c and bearings e e.

The bars d d rest at their ends on the lower bearings ff of the bars a c, and the sides of the upper bearings may, as heretofore, be depended on to hold these bars in position, as shown at cl, Fig. 1 butit is preferable to provide these lower bearings f f with guideflanges f f and the bars (l d with recesses cl2 d2, as shown in one of the bars, Figs. 1, 2, and 3, whereby the bars d d are controlled in a manner similar to the bars c c.

With the exception of slight differences in the shapeof their ends, all of the longitudinal loo bars are alike, and my improvement in the construction of the bars, which I will now describe, is clearly shown in Figs. 4 and 5.

Each bar is approximately tubular in form, and is composed of two longitudinally-curved ribs g g', secured together by short pieces of pipe h h, which are passed through the internal lugs g2 g2 and riveted over the outer sides of the ribs. The upper edges of the ribs g g' are provided with teeth t' i, which extend down the outer curved sides of the ribs. The lower parts of the ribs are fiat fora short distance and join the curved portions by a reverse curve, as seen at Fig. 5, which view also clearly shows that with this form of longitudinal ribs the vertical sections of the airspaces between the ribs of each bar and between the adjacent bars are irregular and parallel and narrow only short distances, thus reducing to a minimum the heating of Vthe ribs by radiation between adjacent ribs and convection of the heated air. Bars of this form have the further advantage of possessing the maximum strength by the use of a minimum amount of metal, which is an iinportant factor in grate-bars. The form insures against breakage and warping, and the light weight greatly reduces the conduction of heat from the upper to the lower part of the bars.

Having now described my invention, what I claim, and desire to secure by Letters Patent, is

l. In ashaking grate, the combination,with transverse crank-bearing bars having guideflanges at the ends of the crank-bearing vsurfaces, of longitudinal bars having curved surfaces to set over the bearing-surfaces of the crank bearing bars, and recesses at their sides for the reception of the guide-flanges, substantially as and for the purposes set forth.

2. In a grate-bar, in combination, the longitudinally-curved ribs gg', each provided` with teeth z il at their upper edges, and spacing-lugs g2 g2 on their sides, and the connecting pipes or rivets h h.

In witness whereof I have hereunto set my hand this 27th day of February, 1888.

OWEN REILLY.

Witnesses:

ALFRED SHEDLOCK, G. H. STARRETT. 

